EDITOR’S NOTE: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

No one — and I mean no one — saw the Pittsburgh Penguins fighting for their playoff lives in Game 4 of their first-round series against their archrival Philadelphia Flyers, but that's the deal. So, ...

Who needs flowers or jewelry when you’ve got rocks? In the penguin world, the ultimate romantic gesture is gifting the perfect pebble. To mark the start of breeding season, gentoo penguins work to ...

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When the Pittsburgh Penguins made the playoffs, their PR catchphrase was “Flip the Script.” Receipts time. Revenge tour. You doubted us, but we showed you. Looks like the doubters were right. It just ...

After four years, Sidney Crosby and the Penguins are back in the Stanley Cup playoffs. Steph Chambers / Getty Images The Pittsburgh Penguins aren’t supposed to be here. They’re too old and too young.

The Philadelphia Flyers are back in the playoffs, and what better opponent to be greeted with than the hated Pittsburgh Penguins? It's been about a decade since the Flyers faced off against Sidney ...

For the first time in nearly a decade, the Philadelphia Flyers are back in the NHL playoffs. It's fitting that Philly will take on one of their biggest rivals in the Pittsburgh Penguins, which are ...

HEY WE’RE GOING TO TALK PIRATES STEELERS AND PENGUINS. LET’S START ON THE ICE. TIM. THE PENGUINS HAVE HOME ICE FOR ROUND NUMBER ONE. LOOKING LIKE THEY’LL PLAY THE FLIERS IN THE FIRST ROUND. MY ...

Antarctica’s iconic emperor penguin has been deemed an endangered species as the sea ice it depends on shrinks because of rising temperatures. The penguins’ population is expected to drop by half by ...

The Pittsburgh Penguins are entering the weekend riding momentum, with a postseason berth already clinched and knowing they are locked into the No. 2 seed in the Metropolitan Division. Pittsburgh ...